Cold forming aluminum foil, the scientific name is cold stamping forming the solid medicinal composite rigid sheet (commonly known as cold forming aluminum, alu alu foil, cold form alu alu foil). Aluminum foil has a series of good properties, it is mainly used in three major fields such as medical packaging, electrical, and construction. Among them, the demand for packaging is the largest, and the packaging takes medicinal blister packaging as an example. Medicinal blister packaging is generally made of medicinal cold-formed composite alu household foil.